This book discusses how good companies can become great by studying companies that made successful transformations. It found that these companies exhibited level 5 leadership, focused on finding the right people rather than just paying more, confronted hard facts realistically yet with faith, developed a simple "hedgehog concept" strategy, built a disciplined culture, used technology to accelerate progress, and persevered through consistent, step-by-step efforts like a flywheel rather than trying to change everything at once. The book provides tools to help professionals and organizations strive for greatness.